Chemistry of Water

What substance do scientists seek in the universe to determine if there is life elsewhere?

• carbon dioxide

• water

• oxygen

• ozone

How many hydrogen atoms are in 1 molecule of water (H₂O)?

• 1

• 2

• 3

• 4

What kind of bond is in water?

• Covalent bond

• ionic bond

• metallic bond

• no bond

What kind of bonding happens between water molecules because of the slightly positive hydrogen atoms and the slightly negative oxygen atoms?

• ionic bond

• hydrogen bonds

• metallic bonds

• no bonds

Water has...

• low cohesion

• High cohesion

Water has...

• Low surface tension

• High surface tension

Is water a good solvent (dissolves things well)?

• yes

• no

hydrophilic substances...

• do not dissolve in water (ex. oil and water)

• do dissolve in water (ex. sugar in water)

hydrophobic substances...

• do not dissolve in water (ex. oil in water)

• do dissolve in water (ex. sugar in water)

What scientist was the first to discover that hydrogen is a distinct substance and to determine the composition of water?

• Schrodinger

• Einstein

• Mendeleev

• Cavendish